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WILLIAM E. LEIGHTON, OF PEMBROKE, MAINE.

BOX AND BLANK THEREFOR.

SPECIFICATION forming part of Letters Patent NO. 672,275, dated April16, 1901.

Application filed December 29, 1899. berallto. 741,914. (No model.)

To all whom. it may concern:

Be it known thatLWILLIAM E. LEIeHToN, a citizen of the United States,residing at Pembroke, in the county of Washington and State oi' Maine,have invented certain new and useful Improvementsin `Boxes and BlanksTherefor; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enableI others skilledin the art to which itappertains to make and use the same. f

My invention relates to improvements in boxes and blanks therefor.

It relates specially to substantially rectangular boxes with roundedcorners-such as are used, for example, in packing sardines. They areusually constructed of metal. They may, however, be used for any purposeand maybe constructed of any suitable material. I'Iitherto the bottomand body of such boxes have been made of two parts soldered together.

The object of the present invention is to form the bottom and body ofthe box from a single piece. 'lo accomplish this, I form the blank in apeculiar way, hereinafter fully described.

In the drawings herewith accompanying and making a part of thisapplication, Figure l is a perspective view of the box when completelyformed from said blank. Fig. 2 is a plan view of the blank from whichthe box is constructed, and Fig. 3 is a perspective View of one ofthecorners when the edges overlap.

Same letters refer to like parts.

The blank from which the box is formed consists of a single piece ofmaterial having a central area A 4equal in extent and similar in shapeto the bottom of the proposed box and having rounded corners B.Surrounding said central area is a rim or border C of a width equal tothe height of the box. From the corners of said border C are removedangular portions, leaving open spaces D in the blank. Portions E of saidblank adjacent to said open spaces have a curvature similar to thecurvature of the corners of the bottom. The open spaces D may or may notextend quite to line F, which indicates the outer edge of the bottomportion, but may terminate a short distance outside, as at line G. Thesmall amount of extra fulness at the corners in that portion of theblank which lies between lines F and G is taken up and assimilated bythe dies when the border is turned up; but it would be impossible to doso if it were attempted to retain all of the material to the outside ofthe border. The dies turn the outer edges or border of the blank to avertical position relative to the bottom, which brings together theadjacent edges at the corners from which said angular portions have beenremoved, and because of the rounded corners the height of the body ofthe box when thus turned up is uniform throughout its entire extent. Anyconvenient means may be employed to unite said edges. A convenient andsatisfactory method for metal boxes is to cover the joints with a thinmetallic stay K, securing it with solder. The stay may be on either sideof the joint, though the drawings show it on the outside. When the blankis made of paper or pasteboard the edges may be secured in a manneraltogether similar by covering the joints with strips of cloth or paperand securing the same by means of cement or paste. The meeting edges ofthe body of the box may abut, as seen at II in Fig. l, or overlap, asseen at I in Fig. The stay may be dispensed with, if desired.

I have found that it is practicable to mold a portion of the blank intoa vertical relation to the bottom without extending the apex of thespace quite to the bottom of the box, and this is found to be anexceedingly valuable feature of my invention, because the joints in thebody of the box do not extend when formed quite to the bottom, leaving aspace J, equal to the distance between lines F and G, uncut, and thuspermitting the formation of a more perfect joint, inasmuch as it is onlya straight slit terminating above the bend in the material. y

The advantages of my improved box are that it effects a materialsavingin the amount of solder used and in the time necessary toconstruct the box. It is also stronger and less liable to be imperfectby reason of the solder failing to make a perfect joint.

Having thus described my invention and its use, I'claimul. A box-blankadapted to form the body and bottom of a rectangular box with roundedcorners consisting of a sheet of material IOO having the main portionsof its sides and ends straight, angular open spaces at the corners andsmall portions of the sides and ends adjacent to the angular open spacescurved, whereby, when the blank is formed up, the body has a uniformheight above the bottom.

2. A box-blank adapted to form the bottom and body7 of a rectangular boxwith rounded corners consisting of a sheet of material having the mainportions of its sides and ends straight, angular open spaces at thecorners, the apexes of which terminate at a point Within the portion ofthe blank which' is turned up to form the body of the box, and smallportions of the sides and ends adjacent to the angular open spaces beingcurved, whereby, when the blank is formed up, the body7 has a uniformheight.

3. Aboxhavingits bottom and body formed of a single piece of material,rounded corners and vertically-disposed joints in said corners extendingdownwardly from the top to a point somewhat removed from the bottom.

4. Aboxhavingits bottom and body formed of a single piece of material,rounded corners, vertically-disposed joints in said corners eX- tendingdownwardly from the top to a point somewhat removed from the bottom andmeans for securing said joints.

In testimony whereof I affix my signature, in presence of ltwowitnesses, this 21st day ot' December, 1899.

WILLIAM E. LEIGI-ITON.

Witnesses:

ELGIN C. VERRILL, NATHAN CLIFFORD.

